Pen



FIG. 1 is a front side perspective view of my new design with thephantom lines depicting environmental structure and forming no part ofthe claimed design;

FIG. 2 is a front elevational view thereof with the phantom linesdepicting environmental structure and forming no part of the claimeddesign;

FIG. 3 is a right side elevational view thereof which is a mirror imageof the left side thereof with the phantom lines depicting environmentalstructure and forming no part of the claimed design;

FIG. 4 is a back elevational view thereof with the phantom linesdepicting environmental structure and forming no part of the claimeddesign;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof with the phantom lines depictingenvironmental structure and forming no part of the claimed design.

The ornamental design for a pen, as shown and described.